Java 中的 CompoundName remove()方法，示例

原文:https://www . geesforgeks . org/compound name-remove-method-in-Java-with-examples/

javax.naming.CompoundName 类的 remove() 方法用于从该复合名称中移除位于 posn 位置的组件。位置 posn 作为参数传递给该方法。此方法移除位于“posn”位置的复合名称对象的组件，并且位于大于“posn”位置的组件下移一位。对象的大小减少 1。

语法:

public Object remove(int posn)
       throws InvalidNameException

参数:该方法接受 posn，posn 是要删除的组件的索引。必须在[0，size()]范围内。

返回值:此方法返回移除的组件(字符串)。

异常:如果 posn 在指定范围之外(包括复合名称为空的情况)并且 InvalidNameException 如果删除组件会违反复合名称的语法，则此方法将引发arrayindextofboundsexception。

以下程序说明了 CompoundName.remove()方法: 程序 1:

// Java program to demonstrate
// CompoundName.remove()
import java.util.Properties;

import javax.naming.CompoundName;
import javax.naming.InvalidNameException;

public class GFG {
    public static void main(String[] args) throws InvalidNameException
    {

        // need properties for CompoundName
        Properties props = new Properties();
        props.put("jndi.syntax.separator", "@");
        props.put("jndi.syntax.direction",
                  "left_to_right");

        // create compound name object
        CompoundName CompoundName1
            = new CompoundName(
                "0@1@2@3@4@5@6@7",
                props);

        // apply remove()
        String removedComponent
            = (String)
                  CompoundName1.remove(5);

        // print value
        System.out.println(
            "Removed Component: "
            + removedComponent);
        System.out.println(
            "CompoundName After removal:"
            + CompoundName1);
    }
}

Output:

Removed Component: 5
CompoundName After removal:0@1@2@3@4@6@7

程序 2:

// Java program to demonstrate
// CompoundName.remove() method
import java.util.Properties;

import javax.naming.CompoundName;
import javax.naming.InvalidNameException;

public class GFG {
    public static void main(String[] args)
        throws InvalidNameException
    {

        // need properties for CompoundName
        Properties props = new Properties();
        props.put("jndi.syntax.separator", "/");
        props.put("jndi.syntax.direction",
                  "left_to_right");

        // create compound name object
        CompoundName CompoundName1
            = new CompoundName(
                "c/e/d/v/a/b/z/y/x/f", props);

        // apply remove()
        String removedComponent1
            = (String)
                  CompoundName1.remove(1);

        // print value
        System.out.println(
            "Removed Component: "
            + removedComponent1);
        System.out.println(
            "CompoundName After removal:"
            + CompoundName1);

        // again remove component
        String removedComponent2
            = (String)
                  CompoundName1.remove(2);

        // print results
        System.out.println("Removed Component: "
                           + removedComponent2);
        System.out.println("CompoundName After removal:"
                           + CompoundName1);
    }
}

Output:

Removed Component: e
CompoundName After removal:c/d/v/a/b/z/y/x/f
Removed Component: v
CompoundName After removal:c/d/a/b/z/y/x/f

参考文献:https://docs . Oracle . com/javase/10/docs/API/javax/naming/compound name . html # remove(int)

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